[1] Univ Padua, Dept Neurosci, Otolaryngol Sect, Via Giustiniani 2, I-35128 Padua, Italy
[2] Univ Padua, Dept Mol Med, Padua, Italy
[3] Royal Natl ENT & Eastman Dent Hosp, Dept Ear Nose & Throat, London, England
[4] UCL, Ear Inst, London, England
[5] Univ Hosp Padova, Infect Dis Unit, Padua, Italy
[6] Univ Padua, Dept Stat Sci, Padua, Italy
[7] Univ Padua, Dept Math Tullio Levi Civita, Padua, Italy
[8] Univ Padua, Dept Neurosci, Neurol Sect, Padua, Italy